Post on 16-Mar-2018
transcript
SENSOR DEVICES FOR REMOTE SENSING
DONG KYOO KIM
2017.9.11
The 14th U.S.-Korea Forum on Nanotechnology: Internet of Things (IoT) including Nanosensors and
Neuromorphic Computing
CONTENTS
1. RADAR FOR REMOTE SENSING
2. PENETRATION RADAR
3. BIO RADAR
4. GESTURE RADAR
5. CONCLUSIONS
REMOTE SENSING • DEFINITION(WIKI): THE ACQUISITION OF INFORMATION ABOUT AN OBJECT OR PHENOMENON
WITHOUT MAKING PHYSICAL CONTACT WITH THE OBJECT
• EXAMPLES: WEATHER RADAR, AIRBORNE RADIO MAP RADAR
• USUALLY INDUSTRIAL OR MILITARY PRODUCT
google play store
Rain droplet tracking, Thunderstorm tracking
wikipedia
www.quora.comEarth surface Imaging
REMOTE SENSING TO OUR LIFE
• REMOTE SENSING TECHNOLOGY COMES TO OUR LIFE
• MILITARY, INDUSTRIAL DEVICE TO CONSUMER ELECTRONIC DEVICE
• BIG SYSTEM TO SMALL SIZED MODULE
• RESEARCH AREA: PENETRATION, BIO, GESTURE RADAR
GROUND PENETRATION RADAR (GPR)• TRANSMIT ELECTROMAGNETIC WAVES.
• BOUNDARIES WITH DIFFERENT MATERIALS REFLECT
WAVES.
• PENETRATION IMAGE CAN BE OBTAINED BY THE
REFLECTED WAVES.
TIME-DOMAIN REFLECTED WAVE IMAGINGRadar signal transmission
Signal Record
Reflected Wave Image
Background Noise reduction,
Clutter removal
Focusing, migration
Visualization
GROUND PENETRATION TEST
• PAVED ROAD PENETRATION
• FREQ: 400MHZ ~ 4.5GHZ
• BIG ARRAY ANTENNA
• MOUNTED ON A CAR
time: 13nsecdistance:1.12m(@��=3)
LOCALIZING GPR (LGPR)• LGPR COMPLEMENTS EXISTING VISION-BASED AUTONOMOUS VEHICLE TECHNOLOGIES
• WORKS WELL IN ALL WEATHER CONDITIONS, DAY AND NIGHT
• REAL-TIME ARRAYED TD RW IMAGING
M. Cornick, et al, “Localizing Ground Penetrating RADAR: A Step TowardRobust Autonomous Ground Vehicle Localization,” J. Field Robot., 2015
• Freq:100M~400MHz• Method: Step-Frequency• Spacing: 6MHz
• Array: 12 antennas• TRX: 11 channels
Road surface change
TERAHERTZ PENETRATION IMAGING
• Terahertz: submillimeter radiation
• ITU-designated band: 0.3~3THz
• High resolution due to high bandwidth
• Thin surface penetration
www.terasense.com
• Freq: 50GHz~0.7THz
• Resolution: 1mm
• High speed: 5000 fps
Penetration Camera
MICRO-DOPPLER RADAR
• SMALL ANGLE APPROXIMATION
• ARC-TANGENT DEMODULATION
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I(t)
X�
2
X
Q(t)
Doppler radar
DISPLACEMENT OF BIOLOGICAL SIGNAL
• PHASE SHIFT BY CHEST MOVEMENT OF RESPIRATION AND HEARTBEAT IS DIFFERENT.
• RESPIRATION MAKES 230 DEGREES OF DOPPLER PHASE SHIFT.
• HEARTBEAT MAKES 11 DEGREES OF DOPPLER PHASE SHIFT.
EXAMPLE
• HEARTBEAT SIGNAL CAN BE DETECTED BY 24GHZ MICRO-DOPPLER RADAR
• HEARTBEAT SIGNAL: BLUE LINE
GESTURE RADAR
• EMITS ELECTROMAGNETIC WAVES.
• HAND REFLECTS THIS WAVE ENERGY.
• CAPTURES ENERGY, TIME DELAY, AND FREQUENCY
SHIFT.
• ESTIMATES HAND DYNAMICS.
• DETERMINES GESTURES.
Micro-Doppler signature
BEING SMALLER
• 8MM X 10MM CHIP WITH RADAR TECHNOLOGY THAT USES GESTURE CONTROLS TO MAKE
DEVICES TOUCHLESS.
• 7GHZ MAKES 140PSEC PULSE WAVE.
• FOUR ANTENNAS ARE PLACED TO ACQUIRE AOA INFORMATION.
• BEING TESTED FOR WATCH AND SPEAKER.
CONCLUSIONS
• THREE EMERGING RADAR TECHNOLOGY: PENETRATION, BIO, GESTURE
• TECHNICAL ISSUES
• ARRAY ANTENNA SIZE REDUCTION FOR HIGH QUALITY PENETRATION IMAGING.
• DETECTION RELIABILITY AGAINST MOTION ARTIFACT FOR BIO RADAR.
• REAL-TIME ALGORITHM FOR GESTURE RADAR FOCUSING ALGORITHM (RMA,RDA.)
• TRANSCEIVER ARCHITECTURE, DENSE ARRAY SIGNAL PROCESSING WHEN FREQUENCY CHANGES
FROM GHZ TO THZ.
Thank you